Vernier-adjustment device



June 23, 1925. 1,543,640

v C. D. DE VORE VERNIER ADJUSTMENT DEVICE Filed Jan. 17, 1924 INVENTOR.-

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Patented June 23, 1925.

UNITED .STATES PATENT' OFFICE.

CHARLES D.. DE lVOBJJ, F PHILADELPHIA, PENNSYLVANIA., ASSIGNOR 0F ONE-HALF T O HARRY L. STERN, OF PHILADELPHIA, PENNSYLVANIA;

VERNIER-ADJ'USTMENT DEVICE.

Eppncatmn alec January 17, 1924. serial No. esa'rso.

To all whom it may concern:

Be it known that I, CHARLES D. DE VoRE,

a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Vernier-Adjustment Devices, whereof the following is a specification, reference being had to the accompanying drawings.

My invention relates to a device useful in making vernier adjustments more especially in electrical instruments, for example radio receiving apparatus to adjust the turn dials by which its various instrumentalities such as variable condensers, variometers, va-

rio-couplers, etc., are controlled.

The pur ose of the present invention is to rovide a evice quite separate and distinct om the apparatus itself, and whereby adjusting of the controlling dials may be effected without iniuencing the tuning of the set as a result of the proximity of the person so doing, or in other words, to prevent the iniiuence of the body ca acity of the person 95 from interfering witht e proper tuning of the instrument. In the drawings Fig. I is a perspective view of a vernier adjusting device conveniently embodying my invention, and showing the manner 1n which it may be used to adjust a turndial of radio apparatus; and

Fig. II is a longitudinal sectional view of the same.

As shown, the device comprises a mem- 86 ber 1 in the form of an elongated stem having attached at one end a handle 2 and which has an axial recess at the opposite end as at 3, to receive a tip 4 of rubber or other friction material. Mounted on the member 40 1 is an associate actuating member 5 having fthe form of an elongated sleeve, which in addition to capacity for rotation about the member 1 as an axis, is capable of axial shifting limited in one directlon by the handle 2 and in the opposite direction by lan annular shoulder 6 immediately inward of the tipped end 4 of said axis member. Afixed to the outer end of the actuating member 2 is a disk 7 of friction material, preferably yielding rubber to engage anelement to be'actuated. In order that the actuating member 5 may be conveniently manipulated by the fingers of the hand holding the device, sai@ member has formed upon it near its inner nd, a circumferential protuberance or grasp 8 preferably ornamentally iared as shown and with lts surface corrugated, milled or otherwise roughened as shown at 9 in Fig. 1, to facilitate grasping thereof. j

In 'the use of the device, the rubber tipped end 4 of the axis member 1 is arbitrarily placed against a support contiguous to the element to be actuated, for example as shown, against the surface of the panel "-P of a radio receiving apparatus adjacent a turn-dial D controlling one of the instru mentalities of the set. With the tip 4 thus properly allocated. the sleeve member 5l is shifted forward axialy by the fingers engaging the protuberance 8, to bring the disk 7 into lapping frictional contact with the sloping circumferential margin of the turn-dial D. Rotation of the turn-dial D may thereupon be effected by twirling thev asp 8 between the fingers while pressuy lis maintained upon the handle 2 of the axis member 1 by the hollowof the hand to prevent displacement of the friction tip 4l from' the chosen position on the instrument panel P. The device is of course made wholly of dielectric or insulating material, and so proportioned with regard to length as to predetermine that the hand of the operator be sufficiently remote f rom the instrument to prevent extraneous capacity influences from eecting said instrument electrically so that accurate tuning may be accomplished -and such tuning maintained upon withdrawal of the hand. p

As a-means for yieldingly resisting forward or outward movement of the sleeve 5 on the axis member 1 under action of the fingers as just explained,.a coiled'spring 10 is placed in compression between the inner end of the bore of said sleeve and a square faced annular shoulder ll'adjacent the corj responding end of member 1. NormalIy the spring 10 will serve to maintain the sleeve 5 retracted with its imm 9nd abutting against 1 the contiguous end of the handle 2. It follows therefore, that the tipped end 4 of the stem 1 is normally fully projected beyond the friction disk 7 to the advantage of facilitating its application at the desired location on the panel P. of the instrument. The spring 10, it will be noted, is fully protected agalnst injury or derangement by virtue of its being concealed within the sleeve 5, the shoulder 6 previously mentioned serving in addition to the function already attributed to it, to prevent imposition of excessive compression on said s ring.

Having thus described my invention, I claim:

1. In a device of the character described, a frictionally tipped member adapted to grip against a surface contiguous to an element to be actuated, and a member having limited slidable movement upon and rotatable relative to the first mentioned member to actuate the element aforesaid.

2. In a device of the character described, a frictionally tipped member adapted to grip against a surface contiguous to a turndial,and a member having limited slidable movement upon and rotatable relative to the first mentioned member to actuate the dial.

3. In a device of the character described, a frictionally tipped member adapted to grip upon a surface contiguous to a turndial, and a member having limited slidable relation to and rotatable on the first mentioned member to actuate the turn-dial.

4. In a device of the character described, a frictionally ti grip vupon a sur acecontguous to ,the eriphery of a turn-dial, and a second mem er rotatable and axially shiftable on the first mentioned member to actuate the turn-dial.

5. In a device of the character described, a member having a rubber tip for frictionally engaging a surface contiguous to a turndial, and a second member rotatable and axially movable relative. to the first mentioned member to actuate the turn-dial.

6. In a device of the character described, a member tipped with friction material for insurance against displacement when held in contact lwith a surface contiguous to a turn-dial, and a second member rotatable and axially movable relative to the first mentioned member to actuate the dial.

7. In a device of the character described, an elon ated member of di-electric material adapted-K to be grasped at one end to hold its opposite end against a surface contiguous to a turn-dial, and means operable from thelgrasp end of said member to actuate the 8. In a device of the character described, an axis member in the form of an elongated stem adapted to be grasped at one end to hold its opposite end against a surface contiguous to a turn-dial, and a member in the ped member adapted to form of an elongated sleeve free on the stem and manipulatable from the grasp end'of the axis member to actuate the dial.

9. Ina device of the character described, an axis member in the form of an elongated stem adapted to be grasped at one end to hold its opposite end agamst a surface contiguous to a turn-dial, and a member in the form of an elongated sleeve free for axial shifting and rotation on the stem and manipulatable from the grasp end of said stem to actuate the dial.

10. In a device of the character described, an axis member in the form of an elongated stem adapted to be grasped at one end to hold its opposite end against a surface contiguous to a turn-dial, and a member in the form of anelongated sleeve free for axial shifting and rotation on the stem, said sleeve having at one end a friction disk for engaging the turn-dial and at the opposite end a circumferential protuberance manipulatable from the grasp handle of the axis member.

11. yIn a device of the character described an axis member in the form of an-elongated stem tipped with friction material at one end for insurance against displacement when applied against a surface 'contiguous to the periphery of a turn-dial, and rovided at its oppositeend with a rasp andle, in combination with a mem er 1n the form of an elongated sleeve capable of rotation on said stem and limited axial shifting between the handle aforesaid and a shoulder on the stem.

12. In a device of thecharacterI described, a frictionally tipped member adapted to be gripped upon a surface contiguous to an element to be actuated, a member movable axially` upon and longitudinally relative to the first mentioned member to actuate the element aforesaid, and means for yieldingly resisting such relative movement between the two members.

-4 13. In a device of the character described, an axis member in the'form of an elongated stem adapted to be grasped at one end to hold yits opposite end against a surface contiguous to a turn-dial, a member in the form of an elongated sleeve free for axial shifting and rotation on the stem and manipulatable from the grasp end of said stem to actuate the dial, and means for yieldingly resisting the axial shifting of the sleeve upon the stem. v

14. In a device of the character described an axis member in the form of an elon ated stem adapted to be grasped by a ham?I one end to hold its opposite end against a surface contiguous to a turn-dial, a member in the form of an elongated sleeve free for axial shifting and rotation on the stem, said sleeve havingat one end a friction disk for engaging the turn-dial and at the opposite end a circumferential protuberlle manipulatable from the grasp handle of the axis signed my name at Philadelphia, Pennsylmember, and a spring concealed within the vania, this 11th day of January, 1924. sleeve to normally maintain the latter retracted on the stem and its inner end in CHARLES D DE VORE' 5 abutment with the contiguous end of the Witnesses:

handle. JAMES H. BELL,

In testimony whereof, I have hereunto E. L. FUum'mN. 

